J-GLOBAL ID:201602010630774090   Reference number:58A0071199

Modern Rig for Efficient Drilling.

能率的掘さくの行える新型掘さく装置(この新しい掘さく装置は,古いbargeと新しい機械を組合わせたもので直径12 1/2 in.深さ13,000ftの効率よい掘さくに 使用)
Volume: 56  Issue: 39  Page: 72-74  Publication year: 1958
JST Material Number: D0239A  ISSN: 0030-1388  CODEN: OIGJA   Document type: Article
Country of issue: United States (USA) 
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